Background: This is what I found when I opened a few motorcycle oil filters. I got the idea from similar research done on car filters. I had been a user of Fram filters on both my Honda Hawk and CBR900RR for at least 3 years, as well as my automobiles for the past few. After performing this little experiment, that usage has stopped, and I am attempting to spread the word about Fram filters.
Method: Method? We don't need no steenkin' method! Just a bench vise (or balcony railing at the Skyline), a hacksaw and some beer. Then, just like all good things exposed, post the pics to the 'net! I would be more scientific, but the limited number of manufacturers making motorcycle oil filters and the disparity in construction quality makes the results obvious.
Note on affiliation: I am not now, nor have I ever been affiliated with or employed by any one of these manufacturers or suppliers. I am a Technical Marketing Engineer (translated "computer geek") as a real job (see my resume). This study was not commissioned or paid for by anyone other than me, or the people who donated filters to me. Donation of filters did not automatically get them a good rating.
Note on application: All of the filters in the Honda applications section of this experiment are the same application (they all are direct crossreferences for each other). Honda specifies only a very few filters for their motorcycles (like about two). This particular one covers a great range of the Honda line, as well as a few Kawasaki models (including the EX500).
Note on other applications: For the filters that are for other makes of bikes, or do not crossreference to the Honda filter, I have left out the comparison tables at the top of the page if I don't have a filter to directly compare to. Maybe someday...
Note on price: All prices are quoted without shipping or sales tax.
Feel free to send me e-mail about this page.
Update: I finally got motivated and reshot all the pictures. Hopefully you can see clearly now.